NUVOX INTEGRATED SERVICES DIGITAL NETWORK PRIMARY RATE INTERFACE (ISDN PRI)

7. 1 Description

ISDN-PRI provides access to and from the Public Switched Telephone Network for circuit-switched voice communications. ISDN-PRI uses ISDN architecture to provide an end-to-end digital DS-1circuit. It employs a 1.544 mbps facility and typically provides the customer with twenty-three B channels and one D channel. B channels can be used for voice and data communications. The D channel provides out-of-band signaling and control of the B channels. NUVOX ISDN-PRI service is a two-way flat monthly service for business customers.

The provision of ISDN-PRI is subject to availability of Company facilities and compatibility with customer facilities and equipment. The local calling area specified in paragraph 4.2.2 applies to ISDN-PRI.

Applicable distance sensitive charges will apply as noted in this Document. Other ancillary features listed in the Company’s tariffs or Terms and Conditions which are compatible with ISDN-PRI can be provided under the rates and terms noted.

ISDN-PRI service includes the ISDN Interface; the ISDN Port; and trunks. Optional features are described below.

7.2 Optional Features

Backup D Channel: Provides enhanced survivability of ISDN-PRI links by providing automatic takeover for a failed D channel.

Calling Name and Number Delivery Interface: Delivers calling party telephone number/and or listed name (where technically available) to the called party. Caller ID regulations and features, as defined in Section 5 of this document, apply to ISDN.

Dynamic Channel Allocation (DCA): Enables a customer to designate the quantity of call types to be allocated within previously provisioned criteria for either DID or DOD services. This feature is also known as call-by-call service selection. The customer must specify the total number of channels assigned to the DCA arrangement and the maximum number of channels allocated per call type within the arrangement. Direct Inward Dialing (DID): This service routes incoming calls directly to a station, by-passing the central answering point.

46 DIRECTORY LISTINGS

8.1 General Regulations

8.1.1 The Company shall provide for a single directory listing, termed the primary listing, in the telephone directory published by the dominant exchange service provider in the customer’s exchange areas of the Station number which is designated as the Customer’s main billing number. Directory listings of additional Company Station numbers, other than the Customer’s main billing number, associated with a Customer’s service will be provided for a monthly recurring charge per listing.

8.1.2 The Company reserves the right to limit the length of any listing in the directory by the use of abbreviations when, in its judgment, the clearness of the listing or the identification of the Customer is not impaired thereby. Where more than one line is required to properly list the Customer, no additional charge is made.

8.1.3 The Company may refuse a listing which is known not to constitute a legally authorized or adopted name, obscenities in the name, or any listing which, in the opinion of the Company, is likely to mislead or deceive calling persons as to the identity of the listed party, or is a contrived name used for advertising purposes or to secure a preferential position in the directory or is more elaborate than is reasonably necessary to identify the listed party. The Company, upon notification to the Customer, will withdraw any listing, which is found to be in violation of its rules with respect thereto.

8.1.4 Each listing must be designated Government or Business to be placed in the appropriate section of the directory. In order to aid the user of the directory, and to avoid misleading or deceiving the calling party as to the identity of the listed party, only business listings may be placed in the Business Section and only residential listings in the Residential section. The Company, upon notification to the customer, will withdraw any listing which is found to be in violation of it s rules with respect thereto.

8.1.5 In order for listings to appear in an upcoming directory, the Customer must furnish the listing to the Company in time to meet the directory publishing schedule.

8.1.6 When a customer receives a new telephone number, the Company offers the Customer intercept and referral service without charge for a period of 90 days or until a new directory is issued. If the customer desires this service, the Company will intercept all calls to the Customer’s former telephone number and refer callers to the new telephone number.

8.1.7 In the event of an error in the directory listing of the Customer, the Company will offer intercept service until the issuance of a new directory containing the Customer’s correct telephone number. 8.1.8 If the Company omits the Customer’s listing from the directory or lists an incorrect telephone

number, the Company will credit three months of regulated local charges to the Customer unless the reason for the omission from the directory is because the Customer failed to provide the directory listing to the Company in time to meet the directory publishing schedule.

DIRECTORY LISTINGS (Continued) 8.2 Descriptions

Directory listings are provided in connection with each Customer service as specified herein.

8.2.1 Primary Listing: A primary listing contains the name of the Customer, or the name under which a business is regularly conducted, as well as the address and telephone number of the Customer. This listing is provided at no additional Charge.

8.2.2 Additional Listings: In connection with business service, additional listings are available only in the names of Authorized Users of the Customer’s service, as defined herein. Rates for additional listings are specified under section 8.3, following.

8.2.3 Nonpublished Listings: Listings that is neither printed in directories nor available from Directory Assistance.

A Nonpublished Telephone Service will be furnished, at the Customer’s request, providing for the omission or deletion of the Customer’s telephone listing from the telephone directory and, in addition, the Customer’s telephone listing will be omitted or deleted from the directory assistance records, subject to the provisions set forth in Section 2, Rules and Regulations, 2.1.4.15, 2.1.4.16, 2.1.4.17. Charges for Nonpublished Listings are specified under section 8.3, following.

8.2.4 Nonlisted Numbers: A Nonlisted number will be furnished at the Customer’s request, providing for the omission or deletion of the Customer’s listing from the telephone directory. Such listings will be carried in the Company’s directory assistance and other records and will be given to any calling party. Charges for Nonlisted Listings are specified under section 8.3, following.

8.2.5 Foreign Listings: Where available, a listing in a telephone directory which is not in the Customer’s immediate calling area. The Customer will be charged the rates specified in the document

published by the specific exchange carrier providing the Foreign Listing.

8.2.6 Alternate Listings: Where available, a listing which references a telephone number that is not the primary listing for the Customer. The Customer must provide written verification that the Alternate telephone number is authorized to accept calls. Charges for alternate call listings are specified under section 8.3, following.

48 OPERATOR SERVICES

9.1 Directory Assistance

A customer may obtain Directory Assistance in determining telephone numbers by calling the Directory Assistance operator.

9.1.1 The Customer will be allowed to make up to 2 calls per month to local (411) Directory Assistance at no charge.

9.1.2 The Customer may request a maximum of two telephone numbers per call to Directory Assistance service.

9.1.3 A credit will be given for calls to Directory Assistance under the following circumstances: a) The Customer experiences poor transmission or is cut-off during the call; b) The Customer is given an incorrect telephone number; or

c) Upon request if directory assistance is used to obtain telephone number due to an error in a directory listing.

9.1.4 To obtain a credit as identified under 9.1.3 above, the Customer must notify its Customer Service representative.

Directory Assistance Call Completion is available, where facilities permit, when the Customer requests connection to the telephone number requested from Directory Assistance. There is no call allowance for Directory Assistance Call Completion. Rates apply in addition to charges for Directory Assistance and any applicable toll charges.

OPERATOR SERVICES (Continued)

9.2 Operator Assistance

A customer may obtain the assistance of a local operator to complete local exchange telephone calls in the following manner:

9.2.1 Third Number Billing: Provides the Customer with the capability to charge a local call to a third number which is different from the called or calling party. The party answering at the third number has the option to refuse acceptance of the charges in advance or when queried by the operator. 9.2.2 Collect Calls: Provides the Customer with the capability to charge a call to the called party. On the

operator announcement of a collect call, the called party has the option to refuse acceptance of charges in advance or when queried by the operator.

9.2.3 Calling Cards: Provides the Customer with the capability to place a call using a calling card of an Interexchange Carrier with or without the assistance of an operator.

9.2.4 Person to Person: Calls completed with the assistance of an operator to a particular Station and person specified by the caller. The call may be billed to the called party.

9.2.5 Station to Station: Calls completed with the assistance of an operator to a particular Station. The call may be billed to the called party.

9.2.6 General Assistance: The Customer has the option to request general information from the operator, such as dialing instruction, country or city codes, area code information and Customer Service 800 telephone numbers, but does not request the operator to complete the call.

9.2.7 Operator Assisted Surcharges Surcharges will be applied per call.

50 OPERATOR SERVICES (Continued)

9.2 Operator Assistance - (Continued)

9.2.8 Busy Line Verification: Upon request of the calling party, the Company will determine if the line is clear of “in use” and report to the calling party. Offered subject to availability.

9.2.9 Busy Line Verification with Interrupt: The Operator will interrupt the call on the called line only if the calling party indicates an emergency and requests interruption. Offered subject to

availability.

9.2.10 Busy Line Verification Rates: Rates for Busy Line Verification and Interrupt Service will apply under the following circumstances:

a) The operator verifies that the line is busy with a call in progress. b) The operator verifies that the line is available for incoming calls.

c) The operator verifies that the called number is busy with a call in progress and the Customer requests interruption. The operator will then interrupt the call, advising the called party the name of the calling party.

OPERATOR SERVICES (Continued) 9.3 Additional Operator Services Regulations

9.3.1 The Company will arrange for listing of its name on a LEC’s billing of the Company’s charges, if the LEC has multi-carrier bill listing capability.

9.3.2 The Company will employ reasonable calling card verification procedures, which are acceptable to the companies issuing the calling cards. In order to control fraud, the Company may refuse to accept calling cards, which it determines to be invalid or cards, which it is unable to verify. 9.3.3 The Company will direct all “0” or “00” emergency calls in the quickest manner to the local

emergency service provider at no charge.

9.3.4 Upon request, the Company will transfer calls to other authorized interexchange companies or to the LEC, if billing can list the caller’s actual point of origin.

9.3.5 The Company’s contracts with traffic aggregators will contain provisions which: a) Prohibit the blocking of access to an end-user’s interexchange carrier of choice.

b) Provide for the prominent posting or display, on or near the telephones to be utilized by end- users, of material setting forth the name of the Company, complaint procedures, instructions on reaching the LEC operator as well as other interexchange carriers, and procedures for

emergency calls.

52 MISCELLANEOUS SERVICES

10.1 Presubscription

Presubscription allows Customers to presubscribe to their carrier of choice for toll calls, without dialing the Access Code. Charges apply, per line, to change the customer’s primary interexchange carrier (PIC). 10.2 Individual Case Basis

Individual Case Basis (ICB) pricing, services, and arrangements may be developed by the Company upon request and offered at its discretion on a case-by-case basis to a customer or potential customer. ICB offerings will take into account special customer considerations including, but not limited to, bundled services, volume or term commitments, or a response to a competitive offering, and may differ from rates, terms or services otherwise found in this document. ICB rates and terms will be offered to the Customer in writing and a contract entered into between the Company and the Customer and provided on a non-discriminatory basis. Terms of ICB arrangements will be provided to the Commission pursuant to applicable rules, regulations or laws on a proprietary basis.

10.3 Special Construction 10.3.1 Basis for Charges

Where the Company furnishes a facility or service for which a rate or charge is not specified in the Company’s tariffs or Terms and Conditions, charges will be based on the costs incurred by the Company and may include: (1) non-recurring type charges; (2) recurring type charges; (3) termination liabilities; or (4) combinations thereof.

10.3.2 Basis for Cost Computation

The costs referred to in 10.3.1, above, may include one or more of the following items to the extent they are applicable:

1) Cost installed of the facilities to be provided including estimated costs for the rearrangements of existing facilities. Cost installed includes the cost of: a) equipment and materials provided or used,

b) engineering, labor and supervision, c) transportation, and

d) rights of way; 2) cost of maintenance;

3) depreciation on the estimated cost installed of any facilities provided, based on the anticipated useful service life of the facilities with an appropriate allowance for the estimated net salvage;

4) administration, taxes and uncollectible revenue on the basis of reasonable average costs for these items;

5) license preparation, processing and related fees;

6) tariff or contract preparation, processing and related fees; 7) any other identifiable costs related to the facilities provided; or 8) an amount for return and contingencies.

MISCELLANEOUS SERVICES (Continued) 10.3 Special Construction - (Continued)

10.3.3 Termination Liability

To the extent that there is no other requirement for use by the Company, a termination liability may apply for facilities specially constructed at the request of the Customer.

The termination period is the estimated service life of the facilities provided. The maximum termination liability amount is equal to the estimated amounts for:

1) Cost installed of the facilities provided including estimated costs for arrangements of existing facilities and/or construction of new facilities as appropriate, less net salvage. Cost installed includes the cost of:

a) equipment and materials provided or used, b) engineering, labor and supervision, c) transportation, and

d) rights of way;

2) license preparation, processing, and related fees;

3) tariff or contract preparation, processing, and related fees; 4) cost of removal and restoration, where appropriate; and

5) any other identifiable costs related to the specially constructed or rearranged facilities. The applicable liability method for calculating the unpaid balance of a term obligation is obtained by multiplying the sum of the amounts determined as set forth above by a factor related to the unexpired period of liability and the discount rate for return and contingencies. The amount determined pursuant to the above paragraphs shall be adjusted to reflect the predetermined estimate net salvage, including any reuse of the facilities provided. This product is adjusted to reflect applicable taxes.

10.4 Number Retention

54 MISCELLANEOUS SERVICES (Continued)

10.5 Local Number Portability 10.5.1 Description

Local Number Portability (LNP) allows Customers to keep their current telephone number when they choose to change local service providers. LNP is accomplished by the Central Office Switch making an inquiry (DIP) to the LNP database to find the correct routing information to complete the call.

The Company will provide for LNP where technically feasible for both resold and facilities-based services. The Company bears no liability for a call that is prevented from being completed due to inaccuracies in the LNP database.

LNP fees will be listed as a separate line item on the Customer’s bill. 10.5.2 Local Number Portability – Location Routing Number (LNP-LRN)

LNP-LRN depends on AIN/IN technology. LRN is a 10-digit number used to uniquely identify a switch that has ported numbers. The LRN for a particular switch must be a native NPA-NXX assigned to the local exchange provider for that switch and serves as a network address.

Telecommunications carriers routing telephone calls to an end-user that has ported their telephone number form one Telecommunications carrier to another must perform a database query to obtain the LRN that corresponds to the dialed telephone number. The N-1 Telecommunications provider (the next to the last terminating carrier) is responsible for determining the LRN for the call being terminated. The database query is performed for all calls where the NPA-NXX of a called number has been marked in the switch as portable. The Telecommunications Carrier routes the call to the appropriated Telecommunications Carrier based on the LRN.

10.5.3 Terms and Conditions

A. Local Number Portability is available to telecommunications carriers for use in the provisioning of telecommunications service as specified and to the extent required by the Telecommunications Act of 1996, and the rules and regulations of the Federal

Communications Commission and the Public Utilities Commission of Ohio.

B. LNP is a service arrangement whereby a Customer, who switches his subscription from one Telecommunications Carrier’s service to another Telecommunication Carrier’s service is permitted to retain his existing or currently assigned telephone number when he remains within the same rate center. This change from one Telecommunications Carrier to another constitutes porting a number.

MISCELLANEOUS SERVICES (Continued) 10.5 Local Number Portability (Continued)

10.5.4 Rules and Regulations

A. LNP service and facilities will only be provided where technically feasible and are subject to the availability of facilities pursuant to FCC Docket No. 95-116 an PUCO Case No. 95- 345-IP-COI, and may only be furnished from properly equipped central offices. LNP service and facilities are not offered for Mass-Calling NXX Codes, NXX Codes 555, 976, 950, FX service, or coin telephone service.

B. General Rules and Regulations found in this document apply to this section unless otherwise specified in this section.

10.5.5 Responsibility of the Company

A. The Company is responsible for providing compatible facilities or contracting for compatible facilities to comply with the terms of this section and PUCO and FCC Orders and Rules governing LNP.

B. The Company is responsible for providing accurate and timely updates for the LNP database.

C. The Company is responsible for insuring its facilities are capable of accepting LNP ported